BRAIN TEASERS
Math (page 94)

Math (page 94)

These are fun math riddles. All of these tricky riddles are based on real math concepts and can be solved with purely math and logic. These are the tasks listed 931 to 940.
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Calculate the number 5765

NUMBERMANIA: Calculate the number 5765 using numbers [9, 8, 9, 7, 52, 672] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 1
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Find number abc

If 4a7a5 - bc047 = 2c7bc find number abc. Multiple solutions may exist.
Correct answers: 4
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Calculate the number 3307

NUMBERMANIA: Calculate the number 3307 using numbers [6, 3, 1, 8, 52, 970] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 1
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#brainteasers #math #numbermania

Jury fixing

Murphy, a dishonest lawyer, bribed a man on his client's jury to hold out

for a charge of manslaughter, as opposed to the charge of murder which was brought by the state.

The jury was out for several days before they returned with the manslaughter verdict.

When Murphy paid the corrupt juror, he asked him if he had a very difficult time convincing the other jurors to see things his way.

"Sure did," the juror replied, "the other eleven wanted to acquit."

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MAGIC SQUARE: Calculate A-B-C

The aim is to place the some numbers from the list (13, 14, 16, 21, 22, 24, 37, 38, 40, 90, 91, 98) into the empty squares and squares marked with A, B an C. Sum of each row and column should be equal. All the numbers of the magic square must be different. Find values for A, B, and C. Solution is A-B-C.
Correct answers: 1
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#brainteasers #math #magicsquare
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Find number abc

If 614cb - 54c44 = a1a6 find number abc. Multiple solutions may exist.
Correct answers: 3
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Calculate the number 987

NUMBERMANIA: Calculate the number 987 using numbers [8, 9, 1, 4, 15, 934] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 1
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Find number abc

If 2232a + 678ba = 90bc0 find number abc. Multiple solutions may exist.
Correct answers: 2
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Calculate the number 2488

NUMBERMANIA: Calculate the number 2488 using numbers [4, 8, 6, 4, 70, 526] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 1
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#brainteasers #math #numbermania
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MAGIC SQUARE: Calculate A+B-C

The aim is to place the some numbers from the list (3, 4, 5, 7, 22, 23, 24, 36, 37, 42, 43, 44, 72) into the empty squares and squares marked with A, B an C. Sum of each row and column should be equal. All the numbers of the magic square must be different. Find values for A, B, and C. Solution is A+B-C.
Correct answers: 1
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#brainteasers #math #magicsquare
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Find number abc

If 5c955 + 8c9bc = aba885 find number abc. Multiple solutions may exist.
Correct answers: 8
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#brainteasers #math
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Arago announces electromagnetism

In 1820, Francois Arago announced that a copper wire between the poles of a voltaic cell, could laterally attract iron filings to itself (Ann. de Chim. et de Physique., xv. p.93). His discovery came in the same year that Oersted discovered that an electric current flowing in a wire would deflect a neighbouring compass needle. Arago in the same publication described how he had successfully succeeded in causing permanent magnetism in steel needles laid at right angles to the copper wire. Arago and André-Marie Ampère, discussed and experimented with forming the copper wire into a helix to intensify the magnetizing action. However, it was not until 1825 that the electromagnet in its familiar form was invented by William Sturgeon.«
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